Toshiba MMD-AP0186HP-E Service Manual page 77

Check code
Outdoor 7-segment display
Main
remote
Check
controller
code
L30 L30
L31
P01
P03 P03
P04 P04
AMP Air Conditioning
Location
of
detection
Sub-code
Detected indoor Indoor External
address unit interlock of
indoor unit
I/F Extended IC
error
Indoor Indoor fan motor
unit error
I/F Discharge
temperature
TD1 error
01: Compressor IPDU Activation of
1 side high-pressure
02: Compressor SW
2 side
03: Compressor
3 side
Description System status
Stop of
corresponding
unit
Continued There is part failure in P.C.
operation board (I/F).
Stop of
corresponding
unit
All stop Discharge temperature (TD1)
exceeds 115 "C.
All stop High-pressure SW is
activated.
77
– –
Error detection
Check items (locations)
condition(s)
Signal is present at When external device is
external error input connected to CN80
terminal (CN80) for 1 connector:
minute. 1) Check for defect in
external device.
2) Check for defect in indoor
P.C. board.
When external device is not
connected to CN80
connector:
1) Check for defect in indoor
P.C. board.
Check outdoor P.C. board
(I/F).
Check the lock of fan motor
(AC fan).
Check wiring.
Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
Check outdoor PMVs
(PMV1, 2, 4) for clogging.
Check resistance
characteristics of TD1
sensor.
Check for insufficiency in
refrigerant quantity.
Check for defect in 4-way
valve.
Check for leakage of SV4
circuit.
Check SV4 circuit (wiring
or installation error in
SV41, SV42 or SV43).
Check connection of high-
pressure SW connector.
Check for defect in Pd
pressure sensor.
Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
Check for defect in outdoor
fan.
Check for defect in outdoor
fan motor.
Check outdoor PMVs
(PMV1, 2) for clogging.
Check indoor / outdoor
heat exchangers for
clogging.
Check for short-circuiting
of outdoor suction /
discharge air flows.
Check SV2 circuit for
clogging.
Check for defect in outdoor
P.C. board (I/F).
Check for error in indoor
fan system (possible cause
of air flow reduction).
Check opening status of
indoor PMV.
Check indoor-outdoor
communication line for
wiring error.
Check for faulty operation
of check valve in discharge
pipe convergent section.
Check gas balancing SV4
valve circuit.
Check SV5 valve circuit.
Check for refrigerant
overcharging.
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